| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
|
Gas exchange in humans occurs in the lungs. |
|
What organ is responsible for gas exchange in humans? |
|
|
|
Gas enters the mouth and nose and descends down the wind pipe (trachea). |
|
How does the air enter the lungs? Label diagram from description |
|
|
|
The wind pipe splits into two Bronchi. One Bronchus to each lung. |
|
What does the wind pipe split into when it reaches the lungs? Label diagram from description |
|
|
|
The Bronchi split into small tubes called Bronchioles. |
|
What are the smaller tubes the bronchi split off into called? Label diagram from description |
|
|
|
The Bronchioles lead to the alveoli (air sacs) |
|
What are the structures at the ends of bronchioles called? Label diagram from description |
|
|
|
Lungs are adapted to speed up gas exchange. |
|
What are the lungs adapted to do for gas exchange? Lung dissection |
|
|
| T |
The many Alveoli give the lungs a huge internal surface area. |
|
What adaptation does the alveoli give to help gas exchange? |
|
|
| W |
Alveoli's large surface area allows more particles to travel through at the same time. |
|
How does a large surface area help gas exchange? |
|
|
| T |
Alveoli have good blood supply. |
|
What surrounds the alveoli? |
|
|
| T |
Alveoli's good blood supply maintains the difference in concentration as oxygen is taken away and carbon dioxide delivered quickly. |
|
Why does a good blood supply improve the rate of gas exchange? |
|
|
| T |
Alveoli walls are only one cell thick. |
|
How thick are the alveoli? |
|
|
| T |
Alveoli's one cell thick walls reduces the distance the particles have to travel between the air and the blood. |
|
Why does the thin alveoli wall help gas exchange? |
|
|